The Aurora Borealis

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The Aurora Borealis
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Since the World began, Solar Lights have been an
Integral part of our planet Earth. They do not
depend at all on the human activity, but rather
on that of the Sun and the terrestrial magnetic
field. The Dawn is not as one once believed
(until some 70 years ago), that causes the
reflection of solar light on the ices of the
Arctic. However, it is indeed the Sun, which is
responsible for the Polar Lights as the turbulent
surface of the Sun rejects into the space the
atoms and the subatomic particles (protons,
electrons).   At the time of violent solar
storms, a great quantity of electrons and protons
coming from the Sun arrive in the terrestrial
atmosphere and activate the nitrogen and oxygen
atoms, which become suddenly luminous and produce
the splendid veils (ribbons or curtains) of
coloured light, which are the polar
lights.   They are named Polar because once
arrived in the terrestrial atmosphere, the
particles are taken by the trap of the magnetic
field, which forces them to move towards the
magnetic poles either north (Northern Lights) or
in the south (Aurora Australis)   Dawn with the
shape of a thin elliptic band (the auroral oval)
is centred on the magnetic north and south poles,
i.e. approximately within 700 meters of the
geographical poles. The size of this form depends
on the solar activity the more the Sun is quiet"
and the solar wind calm the oval is smaller
conversely the more the solar wind strikes the
terrestrial magnetic field with force and gusto,
more the dawn becomes broad and extends.
Aurore North South
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The Affect of the Solar atmosphere

• The temperature of the solar atmosphere is
  several million degrees Kelvin (temperature
  C
  temperature K - 273,15).At these temperatures,
  the collisions between the particles are so
  violent that the hydrogen atoms break up into
  electrons and protons.
• This material" is called ionized
  plasma.The Solar wind is when this plasma moves
  away from the sun in all the directions.
  transports the Solar Magnetic Field into
  interplanetary space. The speed and the density
  of this solar wind vary greatly. They are larger
  when the wind comes from the active areas of the
  sun, like the solar spots or protuberances.

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The End